1211104412240 has 20 divisors (see below), whose sum is σ = 2815817758644. Its totient is φ = 484441764864.

The previous prime is 1211104412213. The next prime is 1211104412257. The reversal of 1211104412240 is 422144011121.

It can be written as a sum of positive squares in 2 ways, for example, as 493180343824 + 717924068416 = 702268^2 + 847304^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7569402497 + ... + 7569402656.

Almost surely, 2^{1211104412240} is an apocalyptic number.

1211104412240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211104412240 is an abundant number, since it is smaller than the sum of its proper divisors (1604713346404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211104412240 is a wasteful number, since it uses less digits than its factorization.

1211104412240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15138805166 (or 15138805160 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 1211104412240 its reverse (422144011121), we get a palindrome (1633248423361).

The spelling of 1211104412240 in words is "one trillion, two hundred eleven billion, one hundred four million, four hundred twelve thousand, two hundred forty".